摘要
利用扫描电镜和光学显微镜,对国家二级保护植物翅果油树(Elaeagnus mollis Diels)叶表皮毛的结构及发育,进行了详细的观察。翅果油树叶表皮毛有两种类型:分枝状表皮毛和盾状表皮毛,两者都是由头部和柄部组成。两类表皮毛的原始细胞均起源于叶原基或幼叶的原表皮细胞,经过两次垂周分裂形成四细胞。在发育后期,四细胞的分化状态决定表皮毛的类型。若四细胞平周分裂成上下八细胞,将发育成分枝状表皮毛的头部;若继续垂周分裂成同层八细胞,将发育成盾状表皮毛的头部。柄部的发育过程基本相同,都是由紧靠头部的表皮细胞和叶肉细胞发育而来。
A detailed observation of trichomes＇ structure and development on the surface of China second class protected plant-Elaeagnus mollis Diels leaves＇ trichomes was conducted under scanning elec- tron microscopy （SEM） and stereomicroscope. The leaves beared two types of trichomes, branchy and pehate trichomes, which comprised head and stalk. Both of them originated from the protodermal cells and formed four cells through two successive periclinal divisions. During the late stage of development, the type of trichomes was affected by the differention degree of the four cells. The head cell would developed into branchy trichomes if the four cells splited into eight ones not in a level, and the one would developed into peltate trichomes if the four cells splited into eight ones in a level. The development of stalk were similar, which developed from the near epidermis cells and mesophyll cells.
出处
《植物研究》
CAS
CSCD
北大核心
2008年第6期663-667,共5页
Bulletin of Botanical Research
基金
山西省自然基金项目(20031096)
关键词
翅果油树
表皮毛
Elaeagnus mollis Diels
trichomes
